Fix bug (#47)

Fixed the bug with the version prefix referenced here.  

#24 (comment)

I wrote code to validate this completely.

Author: Steve132

spec/cashaddr.md

@@ -156,39 +156,37 @@ This table defines test vectors for various payloads of sizes 160-512 bits with
 |:----------------------|:--|:----------|:---------------|
 |20|0|bitcoincash:qr6m7j9njldwwzlg9v7v53unlr4jkmx6eylep8ekg2|F5BF48B397DAE70BE82B3CCA4793F8EB2B6CDAC9|
 |20|1|bchtest:pr6m7j9njldwwzlg9v7v53unlr4jkmx6eyvwc0uz5t|F5BF48B397DAE70BE82B3CCA4793F8EB2B6CDAC9|
-|20|0|pref:pr6m7j9njldwwzlg9v7v53unlr4jkmx6ey65nvtks5|F5BF48B397DAE70BE82B3CCA4793F8EB2B6CDAC9|
+|20|1|pref:pr6m7j9njldwwzlg9v7v53unlr4jkmx6ey65nvtks5|F5BF48B397DAE70BE82B3CCA4793F8EB2B6CDAC9|
 |20|15|prefix:0r6m7j9njldwwzlg9v7v53unlr4jkmx6ey3qnjwsrf|F5BF48B397DAE70BE82B3CCA4793F8EB2B6CDAC9|
 |24|0|bitcoincash:q9adhakpwzztepkpwp5z0dq62m6u5v5xtyj7j3h2ws4mr9g0|7ADBF6C17084BC86C1706827B41A56F5CA32865925E946EA|
 |24|1|bchtest:p9adhakpwzztepkpwp5z0dq62m6u5v5xtyj7j3h2u94tsynr|7ADBF6C17084BC86C1706827B41A56F5CA32865925E946EA|
-|24|0|pref:p9adhakpwzztepkpwp5z0dq62m6u5v5xtyj7j3h2khlwwk5v|7ADBF6C17084BC86C1706827B41A56F5CA32865925E946EA|
+|24|1|pref:p9adhakpwzztepkpwp5z0dq62m6u5v5xtyj7j3h2khlwwk5v|7ADBF6C17084BC86C1706827B41A56F5CA32865925E946EA|
 |24|15|prefix:09adhakpwzztepkpwp5z0dq62m6u5v5xtyj7j3h2p29kc2lp|7ADBF6C17084BC86C1706827B41A56F5CA32865925E946EA|
 |28|0|bitcoincash:qgagf7w02x4wnz3mkwnchut2vxphjzccwxgjvvjmlsxqwkcw59jxxuz|3A84F9CF51AAE98A3BB3A78BF16A6183790B18719126325BFC0C075B|
 |28|1|bchtest:pgagf7w02x4wnz3mkwnchut2vxphjzccwxgjvvjmlsxqwkcvs7md7wt|3A84F9CF51AAE98A3BB3A78BF16A6183790B18719126325BFC0C075B|
-|28|0|pref:pgagf7w02x4wnz3mkwnchut2vxphjzccwxgjvvjmlsxqwkcrsr6gzkn|3A84F9CF51AAE98A3BB3A78BF16A6183790B18719126325BFC0C075B|
+|28|1|pref:pgagf7w02x4wnz3mkwnchut2vxphjzccwxgjvvjmlsxqwkcrsr6gzkn|3A84F9CF51AAE98A3BB3A78BF16A6183790B18719126325BFC0C075B|
 |28|15|prefix:0gagf7w02x4wnz3mkwnchut2vxphjzccwxgjvvjmlsxqwkc5djw8s9g|3A84F9CF51AAE98A3BB3A78BF16A6183790B18719126325BFC0C075B|
 |32|0|bitcoincash:qvch8mmxy0rtfrlarg7ucrxxfzds5pamg73h7370aa87d80gyhqxq5nlegake|3173EF6623C6B48FFD1A3DCC0CC6489B0A07BB47A37F47CFEF4FE69DE825C060|
 |32|1|bchtest:pvch8mmxy0rtfrlarg7ucrxxfzds5pamg73h7370aa87d80gyhqxq7fqng6m6|3173EF6623C6B48FFD1A3DCC0CC6489B0A07BB47A37F47CFEF4FE69DE825C060|
-|32|0|pref:pvch8mmxy0rtfrlarg7ucrxxfzds5pamg73h7370aa87d80gyhqxq4k9m7qf9|3173EF6623C6B48FFD1A3DCC0CC6489B0A07BB47A37F47CFEF4FE69DE825C060|
+|32|1|pref:pvch8mmxy0rtfrlarg7ucrxxfzds5pamg73h7370aa87d80gyhqxq4k9m7qf9|3173EF6623C6B48FFD1A3DCC0CC6489B0A07BB47A37F47CFEF4FE69DE825C060|
 |32|15|prefix:0vch8mmxy0rtfrlarg7ucrxxfzds5pamg73h7370aa87d80gyhqxqsh6jgp6w|3173EF6623C6B48FFD1A3DCC0CC6489B0A07BB47A37F47CFEF4FE69DE825C060|
 |40|0|bitcoincash:qnq8zwpj8cq05n7pytfmskuk9r4gzzel8qtsvwz79zdskftrzxtar994cgutavfklv39gr3uvz|C07138323E00FA4FC122D3B85B9628EA810B3F381706385E289B0B25631197D194B5C238BEB136FB|
 |40|1|bchtest:pnq8zwpj8cq05n7pytfmskuk9r4gzzel8qtsvwz79zdskftrzxtar994cgutavfklvmgm6ynej|C07138323E00FA4FC122D3B85B9628EA810B3F381706385E289B0B25631197D194B5C238BEB136FB|
-|40|0|pref:pnq8zwpj8cq05n7pytfmskuk9r4gzzel8qtsvwz79zdskftrzxtar994cgutavfklv0vx5z0w3|C07138323E00FA4FC122D3B85B9628EA810B3F381706385E289B0B25631197D194B5C238BEB136FB|
+|40|1|pref:pnq8zwpj8cq05n7pytfmskuk9r4gzzel8qtsvwz79zdskftrzxtar994cgutavfklv0vx5z0w3|C07138323E00FA4FC122D3B85B9628EA810B3F381706385E289B0B25631197D194B5C238BEB136FB|
 |40|15|prefix:0nq8zwpj8cq05n7pytfmskuk9r4gzzel8qtsvwz79zdskftrzxtar994cgutavfklvwsvctzqy|C07138323E00FA4FC122D3B85B9628EA810B3F381706385E289B0B25631197D194B5C238BEB136FB|
 |48|0|bitcoincash:qh3krj5607v3qlqh5c3wq3lrw3wnuxw0sp8dv0zugrrt5a3kj6ucysfz8kxwv2k53krr7n933jfsunqex2w82sl|E361CA9A7F99107C17A622E047E3745D3E19CF804ED63C5C40C6BA763696B98241223D8CE62AD48D863F4CB18C930E4C|
 |48|1|bchtest:ph3krj5607v3qlqh5c3wq3lrw3wnuxw0sp8dv0zugrrt5a3kj6ucysfz8kxwv2k53krr7n933jfsunqnzf7mt6x|E361CA9A7F99107C17A622E047E3745D3E19CF804ED63C5C40C6BA763696B98241223D8CE62AD48D863F4CB18C930E4C|
-|48|0|pref:ph3krj5607v3qlqh5c3wq3lrw3wnuxw0sp8dv0zugrrt5a3kj6ucysfz8kxwv2k53krr7n933jfsunqjntdfcwg|E361CA9A7F99107C17A622E047E3745D3E19CF804ED63C5C40C6BA763696B98241223D8CE62AD48D863F4CB18C930E4C|
+|48|1|pref:ph3krj5607v3qlqh5c3wq3lrw3wnuxw0sp8dv0zugrrt5a3kj6ucysfz8kxwv2k53krr7n933jfsunqjntdfcwg|E361CA9A7F99107C17A622E047E3745D3E19CF804ED63C5C40C6BA763696B98241223D8CE62AD48D863F4CB18C930E4C|
 |48|15|prefix:0h3krj5607v3qlqh5c3wq3lrw3wnuxw0sp8dv0zugrrt5a3kj6ucysfz8kxwv2k53krr7n933jfsunqakcssnmn|E361CA9A7F99107C17A622E047E3745D3E19CF804ED63C5C40C6BA763696B98241223D8CE62AD48D863F4CB18C930E4C|
 |56|0|bitcoincash:qmvl5lzvdm6km38lgga64ek5jhdl7e3aqd9895wu04fvhlnare5937w4ywkq57juxsrhvw8ym5d8qx7sz7zz0zvcypqscw8jd03f|D9FA7C4C6EF56DC4FF423BAAE6D495DBFF663D034A72D1DC7D52CBFE7D1E6858F9D523AC0A7A5C34077638E4DD1A701BD017842789982041|
 |56|1|bchtest:pmvl5lzvdm6km38lgga64ek5jhdl7e3aqd9895wu04fvhlnare5937w4ywkq57juxsrhvw8ym5d8qx7sz7zz0zvcypqs6kgdsg2g|D9FA7C4C6EF56DC4FF423BAAE6D495DBFF663D034A72D1DC7D52CBFE7D1E6858F9D523AC0A7A5C34077638E4DD1A701BD017842789982041|
-|56|0|pref:pmvl5lzvdm6km38lgga64ek5jhdl7e3aqd9895wu04fvhlnare5937w4ywkq57juxsrhvw8ym5d8qx7sz7zz0zvcypqsammyqffl|D9FA7C4C6EF56DC4FF423BAAE6D495DBFF663D034A72D1DC7D52CBFE7D1E6858F9D523AC0A7A5C34077638E4DD1A701BD017842789982041|
+|56|1|pref:pmvl5lzvdm6km38lgga64ek5jhdl7e3aqd9895wu04fvhlnare5937w4ywkq57juxsrhvw8ym5d8qx7sz7zz0zvcypqsammyqffl|D9FA7C4C6EF56DC4FF423BAAE6D495DBFF663D034A72D1DC7D52CBFE7D1E6858F9D523AC0A7A5C34077638E4DD1A701BD017842789982041|
 |56|15|prefix:0mvl5lzvdm6km38lgga64ek5jhdl7e3aqd9895wu04fvhlnare5937w4ywkq57juxsrhvw8ym5d8qx7sz7zz0zvcypqsgjrqpnw8|D9FA7C4C6EF56DC4FF423BAAE6D495DBFF663D034A72D1DC7D52CBFE7D1E6858F9D523AC0A7A5C34077638E4DD1A701BD017842789982041|
 |64|0|bitcoincash:qlg0x333p4238k0qrc5ej7rzfw5g8e4a4r6vvzyrcy8j3s5k0en7calvclhw46hudk5flttj6ydvjc0pv3nchp52amk97tqa5zygg96mtky5sv5w|D0F346310D5513D9E01E299978624BA883E6BDA8F4C60883C10F28C2967E67EC77ECC7EEEAEAFC6DA89FAD72D11AC961E164678B868AEEEC5F2C1DA08884175B|
 |64|1|bchtest:plg0x333p4238k0qrc5ej7rzfw5g8e4a4r6vvzyrcy8j3s5k0en7calvclhw46hudk5flttj6ydvjc0pv3nchp52amk97tqa5zygg96mc773cwez|D0F346310D5513D9E01E299978624BA883E6BDA8F4C60883C10F28C2967E67EC77ECC7EEEAEAFC6DA89FAD72D11AC961E164678B868AEEEC5F2C1DA08884175B|
-|64|0|pref:plg0x333p4238k0qrc5ej7rzfw5g8e4a4r6vvzyrcy8j3s5k0en7calvclhw46hudk5flttj6ydvjc0pv3nchp52amk97tqa5zygg96mg7pj3lh8|D0F346310D5513D9E01E299978624BA883E6BDA8F4C60883C10F28C2967E67EC77ECC7EEEAEAFC6DA89FAD72D11AC961E164678B868AEEEC5F2C1DA08884175B|
+|64|1|pref:plg0x333p4238k0qrc5ej7rzfw5g8e4a4r6vvzyrcy8j3s5k0en7calvclhw46hudk5flttj6ydvjc0pv3nchp52amk97tqa5zygg96mg7pj3lh8|D0F346310D5513D9E01E299978624BA883E6BDA8F4C60883C10F28C2967E67EC77ECC7EEEAEAFC6DA89FAD72D11AC961E164678B868AEEEC5F2C1DA08884175B|
 |64|15|prefix:0lg0x333p4238k0qrc5ej7rzfw5g8e4a4r6vvzyrcy8j3s5k0en7calvclhw46hudk5flttj6ydvjc0pv3nchp52amk97tqa5zygg96ms92w6845|D0F346310D5513D9E01E299978624BA883E6BDA8F4C60883C10F28C2967E67EC77ECC7EEEAEAFC6DA89FAD72D11AC961E164678B868AEEEC5F2C1DA08884175B|
 
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 ## References
 
 <a name="bch">[1]</a> https://en.wikipedia.org/wiki/BCH_code